Hi Stormy,
You wrote:
"You can't be a religious person and not fall into one of the two categories. Either you think your beliefs are universally true or you don't."

The key word here is "be." Science does not concern itself with the inherent nature of things, but with the behavior of things. It does not matter what a religious person "is."

This is not hairsplitting. It means, though I don't share your definition of "religious," it also does not matter to me. You may define it that way if you must. Your definition is not universal unless the dictionary says so.

It matters not what your definition says unless you are trying to influence the persons who are creating the next edition of the dictionary. If you want them to stipulate that in the definition of "religious," just go ahead now. Call them.